Alasdair, writing on his blog The Daily Ack, also points us in the direction of Caltech’s VOEventNet project page which collects real-time feeds of astronomical events (such as his own) of gravitational microlensing, gamma-ray bursts and x-ray bursts — as of today, all these events are also available as KML network links. For example:

Suddenly, the sky has turned into a huge canvas, ready to be updated in real time via KML.

(Alasdair has more insights in this comment to the previous post on Ogle Earth.)